The word "painer" is not commonly used in the English language, and therefore, it could be challenging to find a suitable antonym for it. One possible interpretation of the term "painer" could be a person who causes pain or distress. In this case, the opposite could be a person who provides comfort, relief, or joy. Alternatively, "painer" could be a misspelling of the word "painter," in which case, the antonyms could include words such as uncreative, unskilled, or inexperienced. As the meaning of "painer" remains unclear, it is challenging to provide precise antonyms without further information.